Old School

[laserist]

Back in the day - Laserium used analog quadrature oscillators (with and without AM & FM), z axis rotation, various spirals, popcorn, audio modulation, offsets, and joystick effects to do some nice stuff. There were some other "one trick" scanned effects too - So what I'm wondering is if anybody else has any manually controlled scanned effects they remember fondly? (and whould care to describe...)

Brian

[chad]

Don't for get about AO chop and scanner color mod with RGBY scanners overlaid or mirrored and rotated. Not to mention scan glass.
Nothing digital I have seen can hold a candle to the color or finesse of those systems.

chad

[mixedgas]

I just picked up three Laser Scanning Devices Co. R2 projectors. Probably the smallest ever varianced projector.
I already had one. I have great ideas about doing a 4 head projector, if I ever get time.


R2's screw onto the end of the certified laser's standard 1"-32 thread (remember those?) and have a pair of scanners and a internal shutter.
If you do not mount the R2 to a laser, they can become either turrent scan heads or sit on a baseplate.

Four head RYGB anyone with mirror and rotate?

Two head and four head abstracts doing overlay color and simple graphics have to be seen to be belived.

Also lumia effects where the projector melts the plastic, and lumia effects using melting metal foil

Laserist, I might send you a scanned in drawing of the LFI "Rainbow" device. Uses a XY pair for color selection and blanking. Yeah, two dimensional color/intensity selection with multiple heads.

Also picked up a air cooled 220V ILT Krypton, but I'll need it in the lab for a while first.

Steve

[Photonbeam]

I used to get some nice underwater effects by reflecting the beam off a vibrating mercury pool in a speaker cone.

[dsli_jon]

..yes, I know there are 'better examples' , but... here's my submission for today's 'spot of inspirational analogue-fx / photon-tea'..



..just...friggin... awesome.. how *fun* it must have-been to play this show / all those layers of fx..

..*sigh*, someday...
j

[polishedball]

Jon any videos of the burn wheel? Thinking of trying it out smoked acrylic?

[Laserhobbit]

Hi,

As a just returned addict, who got addicted in the 80;s and also worked with said "old school" projectors. I could go on for ages about fixing pas banks in a dark planetarium, but instead how's this a list to make the old timers go bleary eyed!


!) Smeared Vaseline on glass, but don't scan it too slow or you get a oily mess
2) Scientific glass tubes and small test tubes to make horizontal scanning effects
3) Yes 2 or 3 three rotating diffraction gratings, no patents back then !
4) Using a PCAOM to modulate the full spectrum before sending through frosted glass
5) Cracked laminated glass
6) Various paperweights with small sections chipped away
7) secondary "scanning" using GM20s
8) The inside of transparent biro pens
9) Counter rotating glass prisms

Must go as I think I have just convinced myself its worth building a new analogue projector! Plus the tears in my eyes are making typing almost impossible LOL

[laserist]

Laserist, I might send you a scanned in drawing of the LFI "Rainbow" device. Uses a XY pair for color selection and blanking. Yeah, two dimensional color/intensity selection with multiple heads.
Steve

Hi Steve, I'd love to see it - though I'd more interested in how it the scanners were driven from a performance aspect...

[laserist]

I talked to Carl Hannigan about using mercury in optical effects way back when - He brought up the whole mercury posioning thing, and I reconsided...

I used to get some nice underwater effects by reflecting the beam off a vibrating mercury pool in a speaker cone.

[Laserhobbit]

Hi Steve, I'd love to see it - though I'd more interested in how it the scanners were driven from a performance aspect...

I think Lobo in Germany used to use this for their colour and blanking around 1992. I don't have any other details though